add materials (mat) files and readme.md

cstrike/models/w_hegrenade.mdl/w_hegrenade.mdl.mat

@@ -0,0 +1,16 @@
+
+{
+"for" "#models/w_hegrenade/f_body.mdl"
+"basecolor_map" "f_body.png"
+//"normal_map" "f_body_normal.png"
+//"metal_map" "f_body_metal.png"
+//"roughness_map" "f_body_roughness.png"
+}
+
+{
+"for" "#models/w_hegrenade/f_top.mdl"
+"basecolor_map" "f_top.png"
+//"normal_map" "f_top_normal.png"
+//"metal_map" "f_top_metal.png"
+//"roughness_map" "f_top_roughness.png"
+}